Pipe-wrench



Prion.

.PATENT A GEORGE L. IvEs, or KALAMAZoo, MICHIGAN.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 595,879,

dated. December 21, 1897- Application filed December 5, 1895. Serial No. 571,120. (No model.)

To all whom it may concern:

Be it known that I, GEORGE L. IVES, a citizen of the United States, residing at the city of Kalamazoo, in the county of Kalamazoo and State of Michigan, have invented a certain new and useful Pipe-Wrench, of which the following is a specification.

My invention relates to improvements in pipe-wrenches.

The objects of my invention are, first, to simplify the construction of pipe-wrenches generally; second, to provide an improved means of securing the jaw-piece in a pipewrench third, to provide improved means of adjusting the movable jaw, and,fourth,to provide an improved adjustable jaw. I accomplish these objects of my invention by the devices and means shown in the accompanying drawings, in which--v Figure 1 is a perspective view of a pipe- Wrench embodying all of the features of my invention. Fig. 2 is an enlarged detail view with the movable jaw shown in section on line 2 2 of Fig. 4. Fig. 3 is a view on line 3 3 of Fig. 2, parts being shown in elevation. Fig. 4 is a sectional viewon line 4 4 of Fig. 2, and Fig. 5 is asectional View on the same line as Fig. 4 With a slight modification of the jawadjusting device.

Similar letters of reference refer to similar parts throughout the several views and all of the sectional views are taken looking in the direction of the little arrows at the ends of the section-1ines.

Referring to the lettered parts of the drawings, A represents the handle portion.

B represents the outer jaw of the wrench, which is formed by making a bend in the end of the handle A. A toothed .jaw-piece B' is secured on the face of the jaw B. This is formed with a cylindrical portion on the back, which is inserted into a suitable cylindrical groove in the jaw B and then headed down at each end to prevent the j aw-piece from being loosened. On the front of the handle A square teeth are cut. The movable jaw C stands at an angle to the jaw B and on its shank portion has teeth corresponding to the teeth on the handle A. A strip of metal C is folded over the shank of the jaw C by each side of the handle A, and a pin t' extends through the same and through the shank of the jaw C and secures them both together. A pivot E extends through the back ends of the plate C, and on this pivot is supported a modified cylindrical lock D. This cylinder is flattened on one side, and a slight bevel is formed from the flattened portion, which is in fact an auxiliary flattened portion at a greater radial distance from the center of the lock. Little collars are secured on the pivot E, the distance from outside to outside of which is a little greater than the thickness of the handle A. A hole is made in the rivet between the collars, and an aperture is also bored into the body D. A piece of springwire D' is inserted through the aperture in the portion D and is wound around the central part of the pivot E by rotating it and then cut oif. This forms a spring which constantly tends to throw thelock D against the .back of the handle. The lock D is milled on its periphery and easily turned backward by pressure of the thumb, which throws that portion of the lock D against the lock of the handle and permits the jaw to be slipped up and down to get the desired point andwill secure it there instantly when the lock is released. Very little strain comes on the pivot E When the Wrench is. in operation, so that a very light pivot Will answer the purpose.

I have shown a modified construction of this pivot in Fig. 5 which is easy to repair in case the spring becomes injured, the device first shown being far more simple to construct, but more difficult to repair. In the modified construction a slot is cut in the lock D to receive the end of the spring D', and the pivot is secured in place by little screws inserted into each end of it. This permits of its easy removal, and consequently the easy insertion of a new spring.

Having thus described my improved Wrench, I desire to state that it can be considerably varied in its details without departing from my invention. The movable jaw of the Wrench constructed in this manner could be used on IOC) always remain permanently in position. The movable jaw C and plate C might be formed in a single piece and would answer their purpose just the saine.

Having thus described my inve11tion,what I claim as new, and desire to secure by Letters Patent, is

l. In a wrench, the combination of the handle portion A, with a jaw B, at its outer end; a tooth-piece B, with a cylindrical rib B on its back, inserted in a corresponding groove in jaw B; a movable jaw C, with teeth on the shank thereof, to engage corresponding teeth on the handle A, a band C', around the shank of said jaw, extending by each side of the handle; a pivot through the projecting portions, joining them together back of the haudle; a lock I), substantially cylindrical in form on said pivot, with flattened portions toward the handle adjacent to each other and at dilerent radial distances from the pivot; a spring D on the pivot to throwr the lock so that the flattened surface farthest from the center, shall strike the handle and lock the jaw, and so arranged that the lock can be turned against the spring onto the other fiatltened su rface, and release the jaw of the wrench as speciiied.

2. In a wrench, the combination of the handle portion with a jaw at its outer end; a movable jaw with teeth to engage corresponding teeth on the handle, and having portions secured thereto, extending by each side of the handle; a lock substantially cylindrical in form, with flattened portions toward thc handle, adjacent to each other at different radial distances from the center, the said lock being pivoted between the projecting portions back of the handle, so that the flattened surfaces are toward the handle; a spring to'throw the lock so that the flattened surface farthest from the center shall strike the handle and look the jaw, and so that the lock can be turned against the spring onto the other Hattened surface and release the jaw as specified.

In Witness whereof I have hereunto set my hand and seal in the presence of two Witnesses.

GEORGE L. Ivns. [L sj Vitnesses:

WALTER S. Woon, V. E. GHAPPELL. 

